TopazImpression.py

#!/usr/bin/env python

'''
Dfine2.py
call Topaz Impression passing the active layer as a temp file. 

Author:
Rob Antonishen
Modified by
Partha Bagchi
Modified by Martin pohl

Version:
0.9 Made it specific to Topaz Collection
0.8 Made it specific to Nik Collection
0.7 fixed file save bug where all files were png regardless of extension
0.6 modified to allow for a returned layer that is a different size 
   than the saved layer for
  0.5 file extension parameter in program list.
0.4 modified to support many optional programs.

this script is modelled after the mm extern LabCurves trace plugin 
by Michael Munzert http://www.mm-log.com/lab-curves-gimp

and thanks to the folds at gimp-chat has grown a bit ;)

License:

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 3 of the License.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

The GNU Public License is available at
http://www.gnu.org/copyleft/gpl.html

'''

from gimpfu import *
import shlex
import subprocess
import os, sys
import tempfile

def gimp_log( text ):
	pdb.gimp_message( text )

def plugin_main( image, drawable, visible ):
  pdb.gimp_image_undo_group_start(image)
  
  # Copy so the save operations doesn't affect the original
  if visible == 0:
    # Save in temporary.  Note: empty user entered file name
    temp = pdb.gimp_image_get_active_drawable(image)
  else:
    # Get the current visible
    temp = pdb.gimp_layer_new_from_visible(image, image, "TopazImpression")
    image.add_layer(temp, 0)

  buffer = pdb.gimp_edit_named_copy(temp, "ShellOutTemp")

  #save selection if one exists
  hassel = pdb.gimp_selection_is_empty(image) == 0
  if hassel:
    savedsel = pdb.gimp_selection_save(image)

  tempimage = pdb.gimp_edit_named_paste_as_new(buffer)
  pdb.gimp_buffer_delete(buffer)
  if not tempimage:
    raise RuntimeError
  pdb.gimp_image_undo_disable(tempimage)

  tempdrawable = pdb.gimp_image_get_active_layer(tempimage)
  
  tempfilename = os.path.join(tempfile.gettempdir(), "ShellOutTempFile.tiff" )
  

  # !!! Note no run-mode first parameter, and user entered filename is empty string
  pdb.gimp_progress_set_text ("Saving a copy")
  pdb.gimp_file_save(tempimage, tempdrawable, tempfilename, tempfilename)

  # Build command line call
  command = "\"C:\\Program Files\\Topaz Labs\\Topaz Impression\\tlimpression.exe\"" + " \"" + tempfilename + "\""
  args = shlex.split(command)

  # Invoke external command
  pdb.gimp_progress_set_text ("calling Impression...")
  pdb.gimp_progress_pulse()
  child = subprocess.Popen(args, shell=False)
  child.communicate()

  # put it as a new layer in the opened image
  try:
    newlayer2 = pdb.gimp_file_load_layer(tempimage, tempfilename)
  except:
    RuntimeError
	
  tempimage.add_layer(newlayer2,-1)
  buffer = pdb.gimp_edit_named_copy(newlayer2, "ShellOutTemp")

  if visible == 0:
    drawable.resize(newlayer2.width,newlayer2.height,0,0)
    sel = pdb.gimp_edit_named_paste(drawable, buffer, 1)
    drawable.translate((tempdrawable.width-newlayer2.width)/2,(tempdrawable.height-newlayer2.height)/2)
  else:
    temp.resize(newlayer2.width,newlayer2.height,0,0)
    sel = pdb.gimp_edit_named_paste(temp, buffer, 1)
    temp.translate((tempdrawable.width-newlayer2.width)/2,(tempdrawable.height-newlayer2.height)/2)

  pdb.gimp_buffer_delete(buffer)
  pdb.gimp_edit_clear(temp)	
  pdb.gimp_floating_sel_anchor(sel)

  #load up old selection
  if hassel:
    pdb.gimp_selection_load(savedsel)
    image.remove_channel(savedsel)
  
  # cleanup
  os.remove(tempfilename)  # delete the temporary file
  gimp.delete(tempimage)   # delete the temporary image

  # Note the new image is dirty in Gimp and the user will be asked to save before closing.
  pdb.gimp_image_undo_group_end(image)
  gimp.displays_flush()


register(
        "python_fu_Topaz_Impression",
        "Call Topaz Impression",
        "Call Topaz Impression",
        "Rob Antonishen",
        "Copyright 2011 Rob Antonishen",
        "2011",
        "<Image>/Photography/Artistic/Topaz Impression",
        "RGB*, GRAY*", 
        [ (PF_RADIO, "visible", "Layer:", 1, (("new from visible", 1),("current layer",0))),
        ],
        [],
        plugin_main,
        )

main()